Modifications to the "snapshost" folder for a virtual machine are not accepted.

Description

I have a virtual machine which is currently using a folder on the C: drive to store its snapshots. I have copied the contents of the "Snapshots" folder to an alternate drive, but whenever I go into the General / Advanced settings section for that virtual machine and change the snapshot folder to the new location it resets back to the original location. No error or information message is shown to indicate why the setting update was not accepted.